Improvement in locks



. H. TAYLR.

Luck.

ITNESSES INVEATOR ATTORNEYS NETERs, FHOTD-UTHOGRAPHER, wASHmGToN. D C,

NO. 165,631. Patentedju|y13,l85.

ATENT WARREN H. TAYLOR, OF STAMFORD, CONNECTICUT.

IMPROVEMENT IN LOCKS.

Specification forming part of Letters Patent No. 165,631, dated July 13,1875 application filed January 28, 1875.

To all whom it may concern:

Be it known that I, WARREN H. TAYLOR, of Stamford, in the county ofFairfield and in the State of Connecticut, have invented certain new anduseful Improvements in Locks; and do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings and to the letters of reference markedthereon, making a part of this specication.

The nature of my invention consists in the construction and arrangementof a round-tuinbler lock, as will be hereinafter more fully set forthand claimed.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure l is an outside view of the lock. Fig. 2 is an inside viewof thesame. Fig. 3 is a section through the line a: w, Fig. 2. Fig. et is asection through the line y y, Fig. 2. Fig. 5 is a side view of one ofthe tumblers; and Fig. 6, a side view of one of the washers between thetumblers.

A represents the lock-plate, provided on the inner side with a suitableguide, a', for the lock-bolt B, said bolt being moved back and forth bymeans of a knob, C. D is the key-hub of the lock, having its outerbea-ring, by means of a shoulder or oli'set, in the lockplate, and itsinner bearing in a cross-bar, b, fastened on two posts or studs, a a,projecting from the inner side of the lock-plate. The outer end of thekey-hub D is of such diameter that the key E may be inserted in a slotmade from the centerto the edge thereof, and including a short slot inthe lock-plate, while the main part of the barrel is of such reduceddiameter that the key will project through the slot in the side thereof.On the main 'part of the key-hub D is placed a spring-plate washer, d,the ends of which are notched to t around the posts a c. A tumbler, G,is then placed on the barrel, then another washer, d', andanothertumbler, G', after which the bar b is placed on the inner end ofthe key-hub, and fastened by screws to the posts a a. The tumblers G Gare made round, as shown in Fig. 5, with a slot, e, in the edge, andwith an irregular-shaped aperture, h, eX- tending from the central hole,through which the key-hub passes, and from one side of the aperature his made a slot, From the larger portion of the key-hub projects a pin,a", parallel with the smaller portion thereof, said pin passing throughthe apertures hin the tumblers. In the lock-plate are two small slots, yy, one above and the other below the front end of the key-hub D. On theinner side of the bolt B, at the inner end, is a projection, f, which isto enter the slots c in the tumblers.

The operation of my lock is as follows: The bolt being pushed out andthe key-hub turned, so that its slot will correspond with the bot'- tomslot y, the key can then be inserted, and by turning the same to theright until itis opposite the upper slot y, the tumblers will' be insuch a position that the bolt can be moved inward, the projection fentering the slots e. When the bolt is pushed outward the key is turneddownward again in either direction, when itis withdrawn, and the boltlocked in its place.

If the tumblers should be disarranged so that the key cannot be insertedfully, it is turned to the left until it can be inserted, and thenturned to the right, as before, the irregular apertures h, with slots t'and the pin a, bringing the tumblers always in proper position whenturning the key-hub to the left.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

The combination of the slotted key-hub D, with pin x, and the tumblers GG', having apertures h and slots c t', as and for the purposes hereinset forth.

In testimony that I claim the foregoing I have hereunto set my hand this27th day of November, 1874.

WARREN H. TAYLOR.

Witnesses:

AUGUST HERMANN, EMORY StrooKwELL.

